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run code in 300+ PHP versions simultaneously
<?php $v0 = '5.6.3RC1'; foreach(array('5.6.2', '5.6.3RC', '5.6.3RC1', '5.6.3RC2', '5.6.3') as $v) { echo "$v vs $v0=", version_compare($v, $v0), "\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
5.6.2 vs 5.6.3RC1=-1 5.6.3RC vs 5.6.3RC1=-1 5.6.3RC1 vs 5.6.3RC1=0 5.6.3RC2 vs 5.6.3RC1=1 5.6.3 vs 5.6.3RC1=1

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